Shiftfast Automotive & Performance

Shiftfast Automotive & Performance Specializing in GM LS/LT based platforms including all types of LS/LT motor swaps. Subaru performance modifications,full engine builds, and Tuning.
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contact us today! Shiftfast Automotive & Performance has one basic goal, customer service! We here at Shiftfast feel that many of the local performance shops nowadays lack or forget that the customer comes first, period. Our approach to this is simple, an open line of communication. We strive to provide consistent updates on the progress of a customers vehicle while in our shop. You will have pie

ce of mind at all times knowing exactly what's happening to your vehicle while in our hands, we will never give you run-a-round or make you feel uncomfortable. We will treat your vehicle as if it is one of our own using only top quality OEM & high-end aftermarket parts, our techs will take great care when working on a customers vehicle and ensure that the job is done right the first time!

Saturday was one hell of a day, my man Derick Gaskins brought one of his crown Vic’s over to throw on the dyno as it’s b...
07/19/2026

Saturday was one hell of a day, my man Derick Gaskins brought one of his crown Vic’s over to throw on the dyno as it’s been beat on for the last three years and really just wanted to get some data and see how everything was performing. After seeing a fuel trim imbalance Derrick quickly found low compression on cylinder 8. Well he said screw it and decided to swap the engine out. Back to his shop we went. Derick did all the heavy lifting getting the motor out while myself and John got the new motor and prepped ready to go in. Started at 10 am motor in and running before 2pm car on the dyno at 2:45pm. Offloaded at the track by 5:45pm. Smoky Gaskins drove the car to first in the heat race and finished second in the main event times were right on where they should have been for track conditions. What a day and all in fun!!

Knocked out this C8 in for tuning along with adding a throttle body on this C7 and retuning. Both done and ready to roll...
07/09/2026

Knocked out this C8 in for tuning along with adding a throttle body on this C7 and retuning. Both done and ready to roll!!

Fox Body number 2 wrapped, in for a gear swap and dif and new rear axles. This one is ready to roll, now we need to talk...
07/01/2026

Fox Body number 2 wrapped, in for a gear swap and dif and new rear axles. This one is ready to roll, now we need to talk the owner into a cam upgrade and MS3Pro install and turn it up!!!

This 86 Mustang came in from a good customer and great friend with the goal in mind of doing cam & heads just to pick up...
06/30/2026

This 86 Mustang came in from a good customer and great friend with the goal in mind of doing cam & heads just to pick up a little power and leave the rest alone and cheat the stock fuel system to make up for the mods. Well we tried to cheat it with upping fuel pressure and injector size but just were not happy with the results. So we slapped a PNP Ms3pro on from Amp Resaerch, dialed it in and this car runs amazing. You can see by the dyno graph this is a completely different car now!! Now it’s time to finish up the other 2 fox bodies and get them rolling!!!

2017 WRX in for tuning. Wrapped this one up in no time. With just an intake and bpv. Making a smooth 290whp. All dialed ...
06/30/2026

2017 WRX in for tuning. Wrapped this one up in no time. With just an intake and bpv. Making a smooth 290whp. All dialed in on Cobb!!

2021 Explorer ST in for a fmic upgrade and tuning. Dialed in to 19 lbs. once we upgrade the charge pipes and down pipes ...
06/29/2026

2021 Explorer ST in for a fmic upgrade and tuning. Dialed in to 19 lbs. once we upgrade the charge pipes and down pipes we will turn it up a bit more, but man these are fun when you add a little more boost!!

2014 WRX in for tuning, sporting ID1050x injectors, Cobb SF, Blousch 440xt turbo making a smooth 335whp!! Dialed in on ...
06/29/2026

2014 WRX in for tuning, sporting ID1050x injectors, Cobb SF, Blousch 440xt turbo making a smooth 335whp!! Dialed in on Cobb of course!!!

Still cranking out Subaru tuning, this 2021 WRX came in for some issues, all came down to tuning. car now runs and drive...
06/27/2026

Still cranking out Subaru tuning, this 2021 WRX came in for some issues, all came down to tuning. car now runs and drives smooth peaking at 21 lbs of boost and holding 20 lbs all the way through the rpm range!! Cobb for the win!! Have three more to knock out by Monday!! We keep them rolling!!

Well I am sorry to say the time has come for this 54 pick up to leave use. This is just one clean fun ride. It came to u...
06/25/2026

Well I am sorry to say the time has come for this 54 pick up to leave use. This is just one clean fun ride. It came to us to put a Holley Terminator on this 454, dialed that in to 530 lbs of torque and 365whp, then we had to fix all the wiring as the lights were not working properly. Changed the rear brakes, calipers and rotors to get her stopping like it should. It Came out nicely and even tho it rattles your brain at idle it cruises great!!

Welp, running out of room with this monster in here!!!
06/24/2026

Welp, running out of room with this monster in here!!!

Address

1140 East Black Street
Rock Hill, SC
29730

Opening Hours

Monday 8:30am - 5pm
Tuesday 8:30am - 5pm
Wednesday 8:30am - 5pm
Thursday 8:30am - 5pm
Friday 8:30am - 5pm

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